542 POACE^. 



Montana, Williams; Colorado, Jones; Oregon, Hoivell for U. S. 

 Dept. Agricul, 350; California, Brandegee, Anderson. 



Montana, Colorado, Oregon to California. 



22. P. alpina L. Sp. PI. 67 (1753). P. divaricata Vill. Hist. 

 PI. Dauph. 2:127 (1786-9). P. variegata Lam. Illustr. 1:181 

 (1791). P . stolonifera Bell. Mem. Acad. Turin, 5:215 (1793). 

 P. badensis Haenke, Willd. Sp. PI. 1:392 (1797). P. coUina 

 Host, Gram. Austr. 2:t. 66 (1801-9). P. thennalis Pers. Syn. 

 1:90 (1805). P. hrevifoUa Gaud. Alpina, 3:31 (1808). P. dis- 

 color Hoppe, Trin. Mem. Acad. St. Petersb. (VI.) 1:375 (1831). 

 P. stricta Hegetschw. & Herr, Fl. Schw. 85 (1840). P. suUilis 

 Schnr, Verb. Siebend. Ver. Naturw. 4:86 (1853). P. sfenantha 

 Janka, Oestr. Bot. Zeitsclir. 14: 383 (1864). P. coronensis Schnr, 

 Enum. PI. Transs. 773 (1866). /'. oreophila Scliur, Enum. PI. 

 Transs. 773 (1866). P. gelida Scbnr. Enum. PI. Transs. 775 

 (1866). 



A soft erect tufted perennial, 12-40 cm. high, smooth or nearly 

 so. Blades of sterile shoots rather thick, flat or conduplicate, 

 1.5-7 mm. long, 2-4-5 mm. wide, apex abruptly acute, those of 

 the culm 2-3 in number, 1-4 cm. long; ligule 2-3 mm. long. 

 Panicle 2-6 cm. long, densely ovate or oblong, or more ojien and 

 pyramidal, apex sometimes nodding, rays in pairs, spikelets 

 bunched at the ends. Spikelet? broadly oval or ovate, usually 

 green, purple, and brown, 3-4-9-flowered, 5-8 mm. long; 

 empty glumes subequal, ovate or oval, acute, short-villously 

 pubescent on the lower half of the keel and margins, first 

 1-3-nerved, 3-4 mm. long, second 3-nerved, 3.2-5 mm. long, ex- 

 tending two-thirds the way or entirely over the floral glume next 

 above; floral glume concave-elliptical, acute, almost acute or obtuse, 

 3.5-5 mm. long; palea elliptical, acute at both ends, 2-toothed, 

 keels ciliate, 2.5-3.5 mm. long. Anthers 1.7 mm. long, 



Labrador, Blodgett; Lower Canada, A. Allen; Michigan (Isle 

 Royale), T. C. Porter; Montana, Williams, Scribner, F. Tweedy, 

 338, 627; Colorado, Jones, J. Wolfe, 1126; Utah, Jones, 1268. 



Greenland, Canada, New Hampshire to llocky Mountains. 



